Improved CO2 separation performance of aqueous choline-glycine solution by partially replacing water with polyethylene glycol

被引：4
作者：
Liu, Sida [1 ]
Li, Hang [1 ]
Chen, Yifeng [1 ,2 ]
Yang, Zhuhong [1 ]
Wang, Honglin [1 ]
Ji, Xiaoyan [2 ]
Lu, Xiaohua [1 ]
机构：
[1] Nanjing Tech Univ, Coll Chem Engn, State Key Lab Mat Oriented Chem Engn, Nanjing 211816, Jiangsu, Peoples R China
[2] Lulea Univ Technol, Div Energy Sci, S-97187 Lulea, Sweden
来源：
FLUID PHASE EQUILIBRIA | 2019年 / 495卷
基金：
中国国家自然科学基金;
关键词：
Ionic liquids; Carbon dioxide; Solubility; Reaction equilibrium thermodynamic model; Regeneration; FUNCTIONALIZED IONIC LIQUIDS; CARBON-DIOXIDE; ABSORPTION; CAPTURE; ACID; EXTRACTION; SOLUBILITIES; ENTHALPIES; VISCOSITY; MIXTURE;
D O I：
10.1016/j.fluid.2019.05.006
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Aqueous choline-glycine ([Cho][Gly]) solution is a potential candidate for CO2 separation owing to its excellent absorption performance and biodegradability. Moreover, the aqueous solution is easy to volatilize at high temperatures. In this work, H2O was partially replaced with polyethylene glycol (PEG200) and the effect of PEG200 on the CO2 separation performance in [Cho][Gly])/H2O was investigated. The viscosity of [Cho][Gly]/H2O/PEG200 and CO2 solubility in the solution were determined experimentally in the temperature range 308.15-338.15 K at pressures <= 6.5 bar. Further, the measured CO2 solubility was fitted with the reaction equilibrium thermodynamic model and the CO2 desorption enthalpy was estimated. The regeneration performance of [Chol[Gly]/H2O/PEG200 was also evaluated. The results revealed that [Choj[Gly]/H2O/PEG200 has a low CO2 desorption enthalpy and high regeneration efficiency. Particularly, [Cho][Gly]/H2O/PEG200 with 30 wt% PEG200 has a high regeneration efficiency of 95%. Owing to its physical-chemical properties and CO2 separation performance, [Chol[Gly]/H2O/PEG200 shows great potential as an absorbent for CO2 separation. (C) 2019 Elsevier B.V. All rights reserved.
引用
收藏
页码：12 / 20
页数：9
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